/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership.  The ASF
 * licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.apache.hadoop.ozone.freon;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.junit.jupiter.MockitoExtension;
import java.io.PrintStream;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.LongSupplier;
import java.util.stream.LongStream;

import static org.mockito.Mockito.anyChar;
import static org.mockito.Mockito.anyString;
import static org.mockito.Mockito.atLeastOnce;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

/**
 * Tests for the Progressbar class for Freon.
 */
@ExtendWith(MockitoExtension.class)
public class TestProgressBar {

  private PrintStream stream;
  private AtomicLong numberOfKeysAdded;
  private LongSupplier currentValue;

  @BeforeEach
  public void setupMock() {
    numberOfKeysAdded = new AtomicLong(0L);
    currentValue = numberOfKeysAdded::get;
    stream = mock(PrintStream.class);
  }

  @Test
  public void testWithRunnable() {

    long maxValue = 10L;

    ProgressBar progressbar =
        new ProgressBar(stream, maxValue, currentValue, true, () -> "");

    Runnable task = () -> LongStream.range(0, maxValue)
        .forEach(counter -> numberOfKeysAdded.getAndIncrement());

    progressbar.start();
    task.run();
    progressbar.shutdown();

    verify(stream, atLeastOnce()).print(anyChar());
    verify(stream, atLeastOnce()).print(anyString());
  }
}
